関西モバイルアプリ研究会 in 関東 (Nov 11, 2017) https://kanmoba.connpass.com/event/70685/
Issue: https://github.com/apple/swift-evolution/pull/757 My Poem: https://gist.github.com/inamiy/e3f5f7524f1bcdc582c2ff8dbbba58dd